The Paris Canyon German soldier inside a "Paris Canyon" smoking a cigarette, May 1, 1918. The “Paris Cannon” (Paris-Geschütz) was a type of German long-range artillery cannon used to bomb Paris during the “Great War”, designed in late 1916 by German arms technician Fritz Rausenberger and manufactured by the steel company Krupp. The "Paris Canyon" was manufactured from the cannon of the 38 cm German artillery Lange Max, equipped with an extension tube, which gave the cannon a length of 34 meters. Seven cannons were built in total. The barrel was mounted on a concrete site with a swivel plate and weighed 256 tonnes. The projectiles, which contained 7 kg of TNT, were initially 21.6 cm in diameter and 96 cm in length, weighing 106 kg. The missiles had a journey time of 182 seconds before being fired, in which they reached a speed of 1,640 m/s. Successive shots eroded the inner steel of the cannon, so larger projectiles were continued to be manufactured to adapt to the b...